1
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Saridag AM, Kahraman M. Layer-by-layer coating of natural diatomite with silver nanoparticles for identification of circulating cancer protein biomarkers using SERS. NANOSCALE 2023; 15:13770-13783. [PMID: 37578149 DOI: 10.1039/d3nr02602g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Surface-enhanced Raman scattering (SERS) is an emerging spectroscopy technique for detecting and characterizing chemical or biological structures in the vicinity of plasmonic nanostructures. Colloidal, solid, and flexible nanostructures are widely used in SERS experiments to enhance the Raman intensity. The nanostructure used in SERS is one of the main influencing parameters and a growing research area. Fabrication of simple and cheap SERS substrates with a high enhancement factor is desired. In this study, we fabricated a reproducible, cheap, and flexible SERS active strip by coating natural diatomite (biosilica) with silver nanoparticles (AgNPs) using the layer-by-layer assembly method and the fabricated strip is used for the label-free identification of circulating cancer protein biomarkers. SERS active strips were fabricated having different numbers of AgNP layers on natural diatomite and comprehensive characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV/vis absorption spectrophotometry were used. SERS activities of the strips depending on the number of layers were evaluated using 4-aminothiophenol (4-ATP) and rhodamine 6G (Rh6G) molecules. We found that the SERS intensity is strongly dependent on the number of AgNP layers, with the maximum SERS intensity obtained from the strip with 5 layers of AgNPs, having a 2.0 × 105 enhancement factor. The strip with the highest SERS activity was used for the label-free identification of circulating cancer protein biomarkers (HER2, CA15-3, PSA, MUC4, and CA27-29). The results demonstrate that the fabricated strip can help in the effective label-free identification of circulating protein biomarkers and open new directions for SERS-based label-free biosensing applications.
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Affiliation(s)
- Ayse Mine Saridag
- Department of Chemistry, Faculty of Arts and Sciences, Gaziantep University, 27310, Gaziantep, Turkey.
| | - Mehmet Kahraman
- Department of Chemistry, Faculty of Arts and Sciences, Gaziantep University, 27310, Gaziantep, Turkey.
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2
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Zhou H, Xu L, Ren Z, Zhu J, Lee C. Machine learning-augmented surface-enhanced spectroscopy toward next-generation molecular diagnostics. NANOSCALE ADVANCES 2023; 5:538-570. [PMID: 36756499 PMCID: PMC9890940 DOI: 10.1039/d2na00608a] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/06/2022] [Indexed: 06/17/2023]
Abstract
The world today is witnessing the significant role and huge demand for molecular detection and screening in healthcare and medical diagnosis, especially during the outbreak of COVID-19. Surface-enhanced spectroscopy techniques, including Surface-Enhanced Raman Scattering (SERS) and Infrared Absorption (SEIRA), provide lattice and molecular vibrational fingerprint information which is directly linked to the molecular constituents, chemical bonds, and configuration. These properties make them an unambiguous, nondestructive, and label-free toolkit for molecular diagnostics and screening. However, new issues in molecular diagnostics, such as increasing molecular species, faster spread of viruses, and higher requirements for detection accuracy and sensitivity, have brought great challenges to detection technology. Advancements in artificial intelligence and machine learning (ML) techniques show promising potential in empowering SERS and SEIRA with rapid analysis and automatic data processing to jointly tackle the challenge. This review introduces the combination of ML and SERS/SEIRA by investigating how ML algorithms can be beneficial to SERS/SEIRA, discussing the general process of combining ML and SEIRA/SERS, highlighting the molecular diagnostics and screening applications based on ML-combined SEIRA/SERS, and providing perspectives on the future development of ML-integrated SEIRA/SERS. In general, this review offers comprehensive knowledge about the recent advances and the future outlook regarding ML-integrated SEIRA/SERS for molecular diagnostics and screening.
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Affiliation(s)
- Hong Zhou
- Department of Electrical and Computer Engineering, National University of Singapore Singapore 117583
- Center for Intelligent Sensors and MEMS (CISM), National University of Singapore Singapore 117608
| | - Liangge Xu
- Department of Electrical and Computer Engineering, National University of Singapore Singapore 117583
- Center for Intelligent Sensors and MEMS (CISM), National University of Singapore Singapore 117608
- National Key Laboratory of Special Environment Composite Technology, Harbin Institute of Technology Harbin 150001 China
| | - Zhihao Ren
- Department of Electrical and Computer Engineering, National University of Singapore Singapore 117583
- Center for Intelligent Sensors and MEMS (CISM), National University of Singapore Singapore 117608
| | - Jiaqi Zhu
- National Key Laboratory of Special Environment Composite Technology, Harbin Institute of Technology Harbin 150001 China
| | - Chengkuo Lee
- Department of Electrical and Computer Engineering, National University of Singapore Singapore 117583
- Center for Intelligent Sensors and MEMS (CISM), National University of Singapore Singapore 117608
- NUS Suzhou Research Institute (NUSRI) Suzhou 215123 China
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3
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Amicucci C, D’Andrea C, de Angelis M, Banchelli M, Pini R, Matteini P. Cost Effective Silver Nanowire-Decorated Graphene Paper for Drop-On SERS Biodetection. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1495. [PMID: 34200106 PMCID: PMC8229787 DOI: 10.3390/nano11061495] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/31/2021] [Accepted: 06/02/2021] [Indexed: 12/17/2022]
Abstract
The use of SERS for real-world bioanalytical applications represents a concrete opportunity, which, however, is being largely delayed by the inadequacy of existing substrates used to collect SERS spectra. In particular, the main bottleneck is their poor usability, as in the case of unsupported noble metal colloidal nanoparticles or because of the need for complex or highly specialized fabrication procedures, especially in view of a large-scale commercial diffusion. In this work, we introduce a graphene paper-supported plasmonic substrate for biodetection as obtained by a simple and rapid aerosol deposition patterning of silver nanowires. This substrate is compatible with the analysis of small (2 μL) analyte drops, providing stable SERS signals at sub-millimolar concentration and a detection limit down to the nanogram level in the case of hemoglobin. The presence of a graphene underlayer assures an even surface distribution of SERS hotspots with improved stability of the SERS signal, the collection of well-resolved and intense SERS spectra, and an ultra-flat and photostable SERS background in comparison with other popular disposable supports.
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Affiliation(s)
- Chiara Amicucci
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
- Department of Industrial Engineering, University of Florence, Via Santa Marta 3, 50134 Florence, Italy
| | - Cristiano D’Andrea
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Marella de Angelis
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Martina Banchelli
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Roberto Pini
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
| | - Paolo Matteini
- “Nello Carrara” Institute of Applied Physics (IFAC), Italian National Research Council (CNR), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy; (C.A.); (C.D.); (M.d.A.); (M.B.); (R.P.)
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4
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Tan P, Li H, Wang J, Gopinath SCB. Silver nanoparticle in biosensor and bioimaging: Clinical perspectives. Biotechnol Appl Biochem 2020; 68:1236-1242. [PMID: 33043496 DOI: 10.1002/bab.2045] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 09/29/2020] [Indexed: 12/18/2022]
Abstract
Recent developments in nanotechnology promoted the production of nanomaterials with various shapes and sizes by utilizing interdisciplinary researches of biology, chemistry, and material science toward the clinical perspectives. In particular, gold and silver (Ag) are noble metals that exhibit tunable and unique plasmonic properties for the downstream applications. Ag exhibits higher thermal and electrical conductivities, and more efficient in the electron transfer than gold with sharper extinction bands. In addition, modified Ag nanoparticle is more stable in water and air. With all these above features, Ag is an attractive tool in various fields, including diagnosis, drug delivery, environmental, electronics, and as antimicrobial agent. In particular, applications of Ag nanoparticle in the fields of biosensor and imaging are prominent in recent days. Enhancing the specific detection of clinical markers with Ag nanoparticle has been proved by several studies. This review discussed the constructive application of Ag nanoparticle in biosensor and bioimaging for the detection of small molecule to larger whole cell in the perspectives of diagnosing diseases.
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Affiliation(s)
- Peng Tan
- Ultrasound Diagnosis Department, Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang City, Jiangxi Province, People's Republic of China
| | - HeSheng Li
- General Surgery, Leping people's Hospital, Phoenix Avenue, Leping, Jiangxi Province, People's Republic of China
| | - Jian Wang
- Clinical Laboratory, Affiliated Hospital of Jiangxi University of traditional Chinese Medicine, Nanchang City, Jiangxi Province, People's Republic of China
| | - Subash C B Gopinath
- Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis, Arau, Perlis, 02600, Malaysia.,Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, Kangar, Perlis, 01000, Malaysia
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5
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Shao F, Cao J, Ying Y, Liu Y, Wang D, Guo X, Wu Y, Wen Y, Yang H. Preparation of Hydrophobic Film by Electrospinning for Rapid SERS Detection of Trace Triazophos. SENSORS (BASEL, SWITZERLAND) 2020; 20:s20154120. [PMID: 32722113 PMCID: PMC7436116 DOI: 10.3390/s20154120] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/18/2020] [Accepted: 07/22/2020] [Indexed: 05/03/2023]
Abstract
For real application, it is an urgent demand to fabricate stable and flexible surface-enhanced Raman scattering (SERS) substrates with high enhancement factors in a large-scale and facile way. Herein, by using the electrospinning technique, a hydrophobic and flexible poly(styrene-co-butadiene) (SB) fibrous membrane is obtained, which is beneficial for modification of silver nanoparticles (Ag NPs) colloid in a small region and then formation of more "hot spots" by drying; the final SERS substrate is designated as Ag/SB. Hydrophobic Ag/SB can efficiently capture heterocyclic molecules into the vicinity of hot spots of Ag NPs. Such Ag/SB films are used to quantitatively detect trace triazophos residue on fruit peels or in the juice, and the limit of detection (LOD) of 2.5 × 10-8 M is achieved. Ag/SB films possess a capability to resist heat. As a case, 6-mercaptopurine (6MP) that just barely dissolves in 90 °C water is picked for conducting Ag/SB-film-based experiments.
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6
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Nguyen AH, Peters EA, Schultz ZD. Bioanalytical applications of surface-enhanced Raman spectroscopy: de novo molecular identification. REVIEWS IN ANALYTICAL CHEMISTRY 2017; 36:20160037. [PMID: 29398776 PMCID: PMC5793888 DOI: 10.1515/revac-2016-0037] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Surface enhanced Raman scattering (SERS) has become a powerful technique for trace analysis of biomolecules. The use of SERS-tags has evolved into clinical diagnostics, the enhancement of the intrinsic signal of biomolecules on SERS active materials shows tremendous promise for the analysis of biomolecules and potential biomedical assays. The detection of the de novo signal from a wide range of biomolecules has been reported to date. In this review, we examine different classes of biomolecules for the signals observed and experimental details that enable their detection. In particular, we survey nucleic acids, amino acids, peptides, proteins, metabolites, and pathogens. The signals observed show that the interaction of the biomolecule with the enhancing nanostructure has a significant influence on the observed spectrum. Additional experiments demonstrate that internal standards can correct for intensity fluctuations and provide quantitative analysis. Experimental methods that control the interaction at the surface are providing for reproducible SERS signals. Results suggest that combining advances in methodology with the development of libraries for SERS spectra may enable the characterization of biomolecules complementary to other existing methods.
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7
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Matteini P, Cottat M, Tavanti F, Panfilova E, Scuderi M, Nicotra G, Menziani MC, Khlebtsov N, de Angelis M, Pini R. Site-Selective Surface-Enhanced Raman Detection of Proteins. ACS NANO 2017; 11:918-926. [PMID: 27960057 DOI: 10.1021/acsnano.6b07523] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Strategies for protein detection via surface-enhanced Raman spectroscopy (SERS) currently exploit the formation of randomly generated hot spots at the interfaces of metal colloidal nanoparticles, which are clustered together by intrusive chemical or physical processes in the presence of the target biomolecule. We propose a different approach based on selective and quantitative gathering of protein molecules at regular hot spots generated on the corners of individual silver nanocubes in aqueous medium at physiological pH. Here, the protein, while keeping its native configuration, experiences an intense local E-field, which boosts SERS efficiency and detection sensitivity. Uncontrolled signal fluctuations caused by variable molecular adsorption to different particle areas or inside clustered nanoparticles are circumvented. Advanced electron microscopy analyses and computational simulations outline a strategy relying on a site-selective mechanism with superior Raman signal enhancement, which offers the perspective of highly controlled and reproducible routine SERS detection of proteins.
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Affiliation(s)
- Paolo Matteini
- Institute of Applied Physics "Nello Carrara", National Research Council , via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Maximilien Cottat
- Institute of Applied Physics "Nello Carrara", National Research Council , via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Francesco Tavanti
- Department of Chemical and Geological Sciences, University of Modena e Reggio Emilia , via Campi 103, 41125 Modena, Italy
| | - Elizaveta Panfilova
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences , 13 Prospekt Entuziastov, 410049 Saratov, Russia
| | - Mario Scuderi
- Institute for Microelectronics and Microsystems, National Research Council , zona industriale strada VIII n.5, 95121 Catania, Italy
| | - Giuseppe Nicotra
- Institute for Microelectronics and Microsystems, National Research Council , zona industriale strada VIII n.5, 95121 Catania, Italy
| | - Maria Cristina Menziani
- Department of Chemical and Geological Sciences, University of Modena e Reggio Emilia , via Campi 103, 41125 Modena, Italy
| | - Nikolai Khlebtsov
- Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences , 13 Prospekt Entuziastov, 410049 Saratov, Russia
- Saratov National Research State University , 83 Ulitsa Astrakhanskaya, 410012 Saratov, Russia
| | - Marella de Angelis
- Institute of Applied Physics "Nello Carrara", National Research Council , via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
| | - Roberto Pini
- Institute of Applied Physics "Nello Carrara", National Research Council , via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy
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8
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Fazio B, D’Andrea C, Foti A, Messina E, Irrera A, Donato MG, Villari V, Micali N, Maragò OM, Gucciardi PG. SERS detection of Biomolecules at Physiological pH via aggregation of Gold Nanorods mediated by Optical Forces and Plasmonic Heating. Sci Rep 2016; 6:26952. [PMID: 27246267 PMCID: PMC4887892 DOI: 10.1038/srep26952] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 05/09/2016] [Indexed: 12/23/2022] Open
Abstract
Strategies for in-liquid molecular detection via Surface Enhanced Raman Scattering (SERS) are currently based on chemically-driven aggregation or optical trapping of metal nanoparticles in presence of the target molecules. Such strategies allow the formation of SERS-active clusters that efficiently embed the molecule at the "hot spots" of the nanoparticles and enhance its Raman scattering by orders of magnitude. Here we report on a novel scheme that exploits the radiation pressure to locally push gold nanorods and induce their aggregation in buffered solutions of biomolecules, achieving biomolecular SERS detection at almost neutral pH. The sensor is applied to detect non-resonant amino acids and proteins, namely Phenylalanine (Phe), Bovine Serum Albumin (BSA) and Lysozyme (Lys), reaching detection limits in the μg/mL range. Being a chemical free and contactless technique, our methodology is easy to implement, fast to operate, needs small sample volumes and has potential for integration in microfluidic circuits for biomarkers detection.
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Affiliation(s)
- Barbara Fazio
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Cristiano D’Andrea
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Antonino Foti
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Elena Messina
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Alessia Irrera
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Maria Grazia Donato
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Valentina Villari
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Norberto Micali
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Onofrio M. Maragò
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
| | - Pietro G. Gucciardi
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Viale F. Stagno D’Alcontres 37, I-98156, Messina, Italy
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9
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Mu Z, Zhao X, Huang Y, Lu M, Gu Z. Photonic Crystal Hydrogel Enhanced Plasmonic Staining for Multiplexed Protein Analysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:6036-43. [PMID: 26436833 DOI: 10.1002/smll.201501829] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 08/05/2015] [Indexed: 05/25/2023]
Abstract
Plasmonic nanoparticles are commonly used as optical transducers in sensing applications. The optical signals resulting from the interaction of analytes and plamsonic nanoparticles are influenced by surrounding physical structures where the nanoparticles are located. This paper proposes inverse opal photonic crystal hydrogel as 3D structure to improve Raman signals from plasmonic staining. By hybridization of the plasmonic nanoparticles and photonic crystal, surface-enhanced Raman spectroscopy (SERS) analysis of multiplexed protein is realized. It benefits the Raman analysis by providing high-density "hot spots" in 3D and extra enhancement of local electromagnetic field at the band edge of PhC with periodic refractive index distribution. The strong interaction of light and the hybrid 3D nanostructure offers new insights into plasmonic nanoparticle applications and biosensor design.
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Affiliation(s)
- Zhongde Mu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, P. R. China
| | - Xiangwei Zhao
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, P. R. China
| | - Yin Huang
- Department of Electrical and Computer Engineering, Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Meng Lu
- Department of Electrical and Computer Engineering, Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Zhongze Gu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, P. R. China
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10
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Matteini P, de Angelis M, Ulivi L, Centi S, Pini R. Concave gold nanocube assemblies as nanotraps for surface-enhanced Raman scattering-based detection of proteins. NANOSCALE 2015; 7:3474-80. [PMID: 25563172 DOI: 10.1039/c4nr05704j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
SERS detection of proteins is typically performed by using labeling agents with stable and high Raman scattering cross sections. This is a valuable approach for trace detection and quantification of a target protein but is unsuitable for inspecting its inherent structural and functional properties. On the other hand, direct SERS of proteins has been mainly devoted to the study of short peptides and aminoacid sequences or of prosthetic groups with intense Raman signals, which is of scarce interest for a thorough characterization of most proteins. Here we try to overcome these limitations by setting-up an effective platform for the structural SERS analysis of proteins. The platform consists of an extended bidimensional array of gold concave nanocubes (CNCs) supported on a PDMS film. CNCs are closely-packed through face-face and face-corner interactions generating a monolayered arrangement featuring well distributed nanoholes. Here the protein homogeneously experiences an E-field enhancement outward from the metal surfaces surrounding it, which causes a large number of vibrations to be contemporarily amplified. The proposed platform provides stable and detailed SERS spectra and confers rapidity and reproducibility to the analysis.
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Affiliation(s)
- Paolo Matteini
- Institute of Applied Physics "Nello Carrara", National Research Council, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy.
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11
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Chen L, Sha L, Qiu Y, Wang G, Jiang H, Zhang X. An amplified electrochemical aptasensor based on hybridization chain reactions and catalysis of silver nanoclusters. NANOSCALE 2015; 7:3300-8. [PMID: 25623467 DOI: 10.1039/c4nr06664b] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In the present study, based on the mimic oxidase catalytic character of nucleic-acid-stabilized silver nanoclusters (DNA/AgNCs) and hybridization chain reactions for signal amplification, the fabrication of a label-free sensitive "turn-on" electrochemical aptasensor for the amplified determination of lysozyme was demonstrated. First, the designed DNA duplex was modified on the electrode. With the specific binding of the target, lysozyme and its aptamer, the lysozyme-binding DNA sequence was liberated, exposing the induced DNA sequence, which in turn triggered the formation of the supersandwich DNA structure. Because the cytosine-rich sequence was designed ingeniously on the DNA sequence, DNA/AgNCs were formed on the supersandwich DNA structure. The peroxidase-like character of DNA/AgNCs produced detectable electrochemical signals for the lysozyme aptasensor, which showed a satisfying sensitive detection of lysozyme with a low detection limit of 42 pM and a wide linear range of 10(-10) M to 10(-5) M.
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Affiliation(s)
- Ling Chen
- Key Laboratory of Chem-Biosensing, Anhui province; Key Laboratory of Functional Molecular Solids, Anhui province; College of Chemistry and Materials Science, Center for Nano Science and Technology, Anhui Normal University, Wuhu 241000, PR China.
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12
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Wang H, Fang J, Xu J, Wang F, Sun B, He S, Sun G, Liu H. A hanging plasmonic droplet: three-dimensional SERS hotspots for a highly sensitive multiplex detection of amino acids. Analyst 2015; 140:2973-8. [PMID: 25799000 DOI: 10.1039/c5an00232j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
3D hotspots in a hanging plasmonic droplet result in an ultrahigh Raman Scattering for the ultratrace and multiplex identification of amino acids.
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Affiliation(s)
- Hongyan Wang
- Department of Oncology
- The First Affiliated Hospital of Anhui Medical University
- Hefei 230022
- P.R. China
| | - Jinmei Fang
- Department of Oncology
- The First Affiliated Hospital of Anhui Medical University
- Hefei 230022
- P.R. China
| | - Jifei Xu
- Department of Oncology
- The First Affiliated Hospital of Anhui Medical University
- Hefei 230022
- P.R. China
| | - Fan Wang
- Department of Oncology
- The First Affiliated Hospital of Anhui Medical University
- Hefei 230022
- P.R. China
| | - Bai Sun
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- P.R. China
| | - Shengnan He
- No. 38 Research Institute of China Electronics
- Technology Group Corporation
- Hefei 230088
- P.R. China
| | - Guoping Sun
- Department of Oncology
- The First Affiliated Hospital of Anhui Medical University
- Hefei 230022
- P.R. China
| | - Honglin Liu
- Institute of Intelligent Machines
- Chinese Academy of Sciences
- Hefei 230031
- P.R. China
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13
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Kahraman M, Wachsmann-Hogiu S. Label-free and direct protein detection on 3D plasmonic nanovoid structures using surface-enhanced Raman scattering. Anal Chim Acta 2014; 856:74-81. [PMID: 25542360 DOI: 10.1016/j.aca.2014.11.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 11/15/2014] [Indexed: 11/18/2022]
Abstract
In this paper we use surface-enhanced Raman spectroscopy (SERS) on 3D metallic structures for label-free detection and characterization of proteins of interest at low concentrations. The substrates are prepared via nanopatterning with latex nano/microparticles and Cr and Ag sputtering, yielding stable, tunable, and mechanically flexible plasmonic structures. The nanovoids generate a SERS signal of the proteins of interest that is background free and independent of the protein charge. Concentrations as low as 0.05 μg mL(-1) could be detected for 4 different proteins. The proteins also exhibit significantly different SERS spectra on these substrates, which is an important feature for future label-free direct detection schemes.
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Affiliation(s)
- Mehmet Kahraman
- Department of Chemistry, Faculty of Arts and Sciences, University of Gaziantep, 27310 Sehitkamil, Gaziantep, Turkey.
| | - Sebastian Wachsmann-Hogiu
- Center for Biophotonics, University of California Davis, Sacramento, CA 95817, USA; Department of Pathology and Laboratory Medicine, University of California Davis, Sacramento, CA 95817, USA.
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14
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Xu LJ, Zong C, Zheng XS, Hu P, Feng JM, Ren B. Label-free detection of native proteins by surface-enhanced Raman spectroscopy using iodide-modified nanoparticles. Anal Chem 2014; 86:2238-45. [PMID: 24460183 DOI: 10.1021/ac403974n] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Proteins perform vital functional and structural duties in living systems, and the in-depth investigation of protein in its native state is one of the most important challenges in the postgenomic era. Surface-enhanced Raman spectroscopy (SERS) can provide the intrinsic fingerprint information of samples with ultrahigh sensitivity but suffers from the reproducibility and reliability issues. In this paper, we proposed an iodide-modified Ag nanoparticles method (Ag IMNPs) for label-free detection of proteins. The silver nanoparticles provide the huge enhancement to boost the Raman signal of proteins, and the coated iodide layer offers a barrier to prevent the direct interaction between the proteins and the metal surface, helping to keep the native structures of proteins. With this method, highly reproducible and high-quality SERS signals of five typical proteins (lysozyme, avidin, bovine serum albumin, cytochrome c, and hemoglobin) have been obtained, and the SERS features of the proteins without chromophore were almost identical to the respective normal Raman spectra. This unique feature allows the qualitative identification of them by simply taking the intensity ratio of the Raman peaks of tryptophan to phenylalanine residues. We further demonstrated that the method can also be used for label-free multiplex analysis of protein mixture as well as to study the dynamic process of protein damage stimulated by hydrogen peroxide. This method proves to be very promising for further applications in proteomics and biomedical research.
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Affiliation(s)
- Li-Jia Xu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, ‡The MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, and §Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China
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15
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Li S, Xiong L, Liu S, Xu P. Fast fabrication of homogeneous Ag nanostructures on dual-acid doped polyaniline for SERS applications. RSC Adv 2014. [DOI: 10.1039/c4ra02004a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We demonstrate a dual-acid doping technique for PANI membranes, which enables fast fabrication of homogeneous Ag nanostructures as SERS-active platforms for chemical detection.
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Affiliation(s)
- Siwei Li
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001, China
| | - Lu Xiong
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001, China
| | - Shuai Liu
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001, China
| | - Ping Xu
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001, China
- HIT-HAS Laboratory of High-Energy Chemistry and Interdisciplinary Science
- Harbin Institute of Technology
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16
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Lee HK, Lee YH, Zhang Q, Phang IY, Tan JMR, Cui Y, Ling XY. Superhydrophobic surface-enhanced Raman scattering platform fabricated by assembly of Ag nanocubes for trace molecular sensing. ACS APPLIED MATERIALS & INTERFACES 2013; 5:11409-11418. [PMID: 24134617 DOI: 10.1021/am403655g] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
An analytical platform suitable for trace detection using a small volume of analyte is pertinent to the field of toxin detection and criminology. Plasmonic nanostructures provide surface-enhanced Raman scattering (SERS) that can potentially achieve trace toxins and/or molecules detection. However, the detection of highly diluted, small volume samples remains a challenge. Here, we fabricate a superhydrophobic SERS platform by assembling Ag nanocubes that support strong surface plasmon and chemical functionalization for trace detection with sample volume of just 1 μL. Our strategy integrates the intense electromagnetic field confinement generated by Ag nanocubes with a superhydrophobic surface capable of analyte concentration to lower the molecular detection limit. Single crystalline Ag nanocubes are assembled using the Langmuir-Blodgett technique to create surface roughness. To create a stable superhydrophobic SERS platform, an additional 25 nm Ag coating is evaporated over the Ag nanocubes to "weld" the Ag nanocubes onto the substrate followed by chemical functionalization with perfluorodecanethiol. The resulting substrate has an advancing contact angle of 169° ± 5°. Our superhydrophobic platform confines analyte molecules within a small area and prevents the random spreading of molecules. An analyte concentrating factor of 14-fold is attained, as compared to a hydrophilic surface. Consequently, the detection limit of our superhydrophobic SERS substrate reaches 10(-16) M (100 aM) for rhodamine 6G using 1 μL analyte solutions. An analytical SERS enhancement factor of 10(11) is achieved. Our protocol is a general method that provides a simple, cost-effective approach to develop a stable and uniform superhydrophobic SERS platform for trace molecular sensing.
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Affiliation(s)
- Hiang Kwee Lee
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
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